Wow, not what I expected. She does look like, in these pictures anyway, like she’d put on some weight, and had a healthier appearance.
But as they say, appearances can be deceiving.
If she had curbed her drug use for awhile, and then went on a binge, whereas before her body was accustomed to it, this particular time, it was more of a shock to the body, and in the weakened state, the body just gave out. She called an ambulance, so it doesn't sound like it was a deliberate overdose, she probably figured her body could still handle it.